/*
 * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.engine.impl.bpmn.behavior;

import com.fasterxml.jackson.databind.node.ObjectNode;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.DynamicBpmnConstants;
import org.activiti.engine.delegate.BpmnError;
import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.delegate.Expression;
import org.activiti.engine.impl.bpmn.helper.ErrorPropagation;
import org.activiti.engine.impl.bpmn.helper.SkipExpressionUtil;
import org.activiti.engine.impl.context.Context;
import org.apache.commons.lang3.StringUtils;

/**
 * ActivityBehavior that evaluates an expression when executed. Optionally, it sets the result of the expression as a variable on the execution.
 *





 */
public class ServiceTaskExpressionActivityBehavior extends TaskActivityBehavior {

    private static final long serialVersionUID = 1L;

    protected String serviceTaskId;
    protected Expression expression;
    protected Expression skipExpression;
    protected String resultVariable;

    public ServiceTaskExpressionActivityBehavior(
        String serviceTaskId,
        Expression expression,
        Expression skipExpression,
        String resultVariable
    ) {
        this.serviceTaskId = serviceTaskId;
        this.expression = expression;
        this.skipExpression = skipExpression;
        this.resultVariable = resultVariable;
    }

    public void execute(DelegateExecution execution) {
        Object value = null;
        try {
            boolean isSkipExpressionEnabled = SkipExpressionUtil.isSkipExpressionEnabled(execution, skipExpression);
            if (
                !isSkipExpressionEnabled ||
                (isSkipExpressionEnabled && !SkipExpressionUtil.shouldSkipFlowElement(execution, skipExpression))
            ) {
                if (Context.getProcessEngineConfiguration().isEnableProcessDefinitionInfoCache()) {
                    ObjectNode taskElementProperties = Context.getBpmnOverrideElementProperties(
                        serviceTaskId,
                        execution.getProcessDefinitionId()
                    );
                    if (
                        taskElementProperties != null &&
                        taskElementProperties.has(DynamicBpmnConstants.SERVICE_TASK_EXPRESSION)
                    ) {
                        String overrideExpression = taskElementProperties
                            .get(DynamicBpmnConstants.SERVICE_TASK_EXPRESSION)
                            .asText();
                        if (
                            StringUtils.isNotEmpty(overrideExpression) &&
                            !overrideExpression.equals(expression.getExpressionText())
                        ) {
                            expression = Context.getProcessEngineConfiguration()
                                .getExpressionManager()
                                .createExpression(overrideExpression);
                        }
                    }
                }

                value = expression.getValue(execution);
                if (resultVariable != null) {
                    execution.setVariable(resultVariable, value);
                }
            }

            leave(execution);
        } catch (Exception exc) {
            Throwable cause = exc;
            BpmnError error = null;
            while (cause != null) {
                if (cause instanceof BpmnError) {
                    error = (BpmnError) cause;
                    break;
                }
                cause = cause.getCause();
            }

            if (error != null) {
                ErrorPropagation.propagateError(error, execution);
            } else {
                throw new ActivitiException("Could not execute service task expression", exc);
            }
        }
    }
}
